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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
#define CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
#include <stdint.h>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread_checker.h"
#include "content/common/content_export.h"
#include "net/base/ip_address.h"
#include "third_party/webrtc/rtc_base/async_resolver_interface.h"
namespace content {
class P2PSocketDispatcher;
// P2PAsyncAddressResolver performs DNS hostname resolution. It's used
// to resolve addresses of STUN and relay servers.
class P2PAsyncAddressResolver
: public base::RefCountedThreadSafe<P2PAsyncAddressResolver> {
public:
using DoneCallback = base::OnceCallback<void(const net::IPAddressList&)>;
P2PAsyncAddressResolver(P2PSocketDispatcher* dispatcher);
// Start address resolve process.
void Start(const rtc::SocketAddress& addr, DoneCallback done_callback);
// Clients must unregister before exiting for cleanup.
void Cancel();
private:
enum State {
STATE_CREATED,
STATE_SENT,
STATE_FINISHED,
};
friend class P2PSocketDispatcher;
friend class base::RefCountedThreadSafe<P2PAsyncAddressResolver>;
virtual ~P2PAsyncAddressResolver();
void OnResponse(const net::IPAddressList& address);
P2PSocketDispatcher* dispatcher_;
base::ThreadChecker thread_checker_;
// State must be accessed from delegate thread only.
State state_;
DoneCallback done_callback_;
DISALLOW_COPY_AND_ASSIGN(P2PAsyncAddressResolver);
};
} // namespace content
#endif // CONTENT_RENDERER_P2P_HOST_ADDRESS_REQUEST_H_
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